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2011-10-17 22:04 162 查看

不久前，在互联网上出现了一篇有趣的文章，讲的是对于同一个问题，不同层次的程序员编出的Phthon代码显示出了不同的风格，代码都很简单，有趣。这篇文章的原始出处在这里
编程新手

def factorial(x):

if x == 0:

return 1

else:

return x * factorial(x - 1)

print factorial(6)

一年编程经验(学Pascal的)

def factorial(x):

result = 1

i = 2

while i <= x:

resultresult = result * i

ii = i + 1

return result

print factorial(6)

一年编程经验

@tailcall

def fact(x, acc=1):

if (x > 1): return (fact((x - 1), (acc * x)))

else:       return acc

print(fact(6))

一年编程经验(Python)

def Factorial(x):

res = 1

for i in xrange(2, x + 1):

res *= i

return res

print Factorial(6)

懒惰的Python程序员

def fact(x):

return x > 1 and x * fact(x - 1) or 1

print fact(6)

更懒的Python程序员

f = lambda x: x and x * f(x - 1) or 1

print f(6)

Python 专家
fact = lambda x: reduce(int.__mul__, xrange(2, x + 1), 1)

print fact(6)

Python 黑客

import sys

@tailcall

def fact(x, acc=1):

if x: return fact(x.__sub__(1), acc.__mul__(x))

return acc

sys.stdout.write(str(fact(6)) + '\n')

专家级程序员


from c_math import fact
print fact(6)

大英帝国程序员


from c_maths import fact
print fact(6)

Web 设计人员

def factorial(x):

#-------------------------------------------------

#--- Code snippet from The Math Vault          ---

#--- Calculate factorial (C) Arthur Smith 1999 ---

#-------------------------------------------------

result = str(1)

i = 1 #Thanks Adam

while i <= x:

#resultresult = result * i  #It's faster to use *=

#result = str(result * result + i)

#result = int(result *= i) #??????

result = str(int(result) * i)

#result = int(str(result) * i)

ii = i + 1

return result

print factorial(6)

Unix 程序员

import os

def fact(x):

os.system('factorial ' + str(x))

fact(6)

Windows 程序员

NULL = None

def CalculateAndPrintFactorialEx(dwNumber,

hOutputDevice,

lpLparam,

lpWparam,

lpsscSecurity,

*dwReserved):

if lpsscSecurity != NULL:

return NULL #Not implemented

dwResult = dwCounter = 1

while dwCounter <= dwNumber:

dwResult *= dwCounter

dwCounter += 1

hOutputDevice.write(str(dwResult))

hOutputDevice.write('\n')

return 1

import sys

CalculateAndPrintFactorialEx(6, sys.stdout, NULL, NULL, NULL,

NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL)

企业级程序员

def new(cls, *args, **kwargs):

return cls(*args, **kwargs)

class Number(object):

pass

class IntegralNumber(int, Number):

def toInt(self):

return new (int, self)

class InternalBase(object):

def __init__(self, base):

self.base = base.toInt()

def getBase(self):

return new (IntegralNumber, self.base)

class MathematicsSystem(object):

def __init__(self, ibase):

Abstract

@classmethod

def getInstance(cls, ibase):

try:

cls.__instance

except AttributeError:

cls.__instance = new (cls, ibase)

return cls.__instance

class StandardMathematicsSystem(MathematicsSystem):

def __init__(self, ibase):

if ibase.getBase() != new (IntegralNumber, 2):

raise NotImplementedError

self.base = ibase.getBase()

def calculateFactorial(self, target):

result = new (IntegralNumber, 1)

i = new (IntegralNumber, 2)

while i <= target:

resultresult = result * i

ii = i + new (IntegralNumber, 1)

return result

print StandardMathematicsSystem.getInstance(new (InternalBase,

new (IntegralNumber, 2))).calculateFactorial(new (IntegralNumber, 6))

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